<?php
class PostController extends Controller {
	/**
	 *
	 * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
	 *      using two-column layout. See 'protected/views/layouts/column2.php'.
	 */
	public $layout = '//layouts/post/column2';
	protected $_model = null;
	
	
	/**
	 *
	 * @return array action filters
	 */
	public function filters() {
		return array (
				'accessControl' 
		); // perform access control for CRUD operations
	}
	
	/**
	 * Specifies the access control rules.
	 * This method is used by the 'accessControl' filter.
	 *
	 * @return array access control rules
	 */
	public function accessRules() {
		return array (
				
				// allow all users to perform 'index' and 'view' actions
				array (
						'allow', 
						'actions' => array (
								'index', 
								'view' 
						), 
						'users' => array (
								'*' 
						) 
				), 
				
				// allow authenticated user to perform 'create' and 'update' actions
				array (
						'allow', 
						'actions' => array (
								'create', 
								'update' 
						), 
						'users' => array (
								'@' 
						) 
				), 
				
				// allow admin user to perform 'admin' and 'delete' actions
				array (
						'allow', 
						'actions' => array (
								'admin', 
								'delete' 
						), 
						'users' => array (
								'admin' 
						) 
				), 
				
				// deny all users
				array (
						'deny', 
						'users' => array (
								'*' 
						) 
				) 
		);
	}
	
	/**
	 * Displays a particular model.
	 *
	 * @param integer $id
	 *        	the ID of the model to be displayed
	 */
	public function actionView() {
		$render ['model'] = $this->loadModel ();
		$render ['comment'] = $this->newComment ( $render ['model'] );
		
		$render ['post_status'] = Lookup::item ( Post::STATUS_NAME, $render ['model'] ['status'] );
		$this->render ( 'view', $render );
	}
	
	/**
	 * Creates a new model.
	 * If creation is successful, the browser will be redirected to the 'view' page.
	 */
	public function actionCreate() {
		$model = new Post ();
		
		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);
		
		if (isset ( $_POST ['Post'] )) {
			$model->attributes = $_POST ['Post'];
			if ($model->save ())
				$this->redirect ( array (
						'view', 
						'id' => $model->id 
				) );
		}
		
		$this->render ( 'create', array (
				'model' => $model 
		) );
	}
	
	/**
	 * Updates a particular model.
	 * If update is successful, the browser will be redirected to the 'view' page.
	 *
	 * @param integer $id
	 *        	the ID of the model to be updated
	 */
	public function actionUpdate($id) {
		$model = $this->loadModel ( $id );
		
		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);
		
		if (isset ( $_POST ['Post'] )) {
			$model->attributes = $_POST ['Post'];
			if ($model->save ())
				$this->redirect ( array (
						'view', 
						'id' => $model->id 
				) );
		}
		
		$this->render ( 'update', array (
				'model' => $model 
		) );
	}
	
	/**
	 * Deletes a particular model.
	 * If deletion is successful, the browser will be redirected to the 'admin' page.
	 *
	 * @param integer $id
	 *        	the ID of the model to be deleted
	 */
	public function actionDelete($id) {
		if (Yii::app ()->request->isPostRequest) {
			// we only allow deletion via POST request
			$this->loadModel ( $id )->delete ();
			
			// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
			if (! isset ( $_GET ['ajax'] ))
				$this->redirect ( isset ( $_POST ['returnUrl'] ) ? $_POST ['returnUrl'] : array (
						'admin' 
				) );
		} else
			throw new CHttpException ( 400, 'Invalid request. Please do not repeat this request again.' );
	}
	
	/**
	 * Lists all models.
	 */
	public function actionIndex() {
		$dataProvider = new CActiveDataProvider ( 'Post' );
		$this->render ( 'index', array (
				'dataProvider' => $dataProvider 
		) );
	}
	
	/**
	 * Manages all models.
	 */
	public function actionAdmin() {
		$model = new Post ( 'search' );
		$model->unsetAttributes (); // clear any default values
		if (isset ( $_GET ['Post'] ))
			$model->attributes = $_GET ['Post'];
		
		$this->render ( 'admin', array (
				'model' => $model 
		) );
	}
	
	/**
	 * Returns the data model based on the primary key given in the GET variable.
	 * If the data model is not found, an HTTP exception will be raised.
	 *
	 * @param
	 *        	integer the ID of the model to be loaded
	 */
	protected function loadModel($id = false) {
		$id = $id ? $id : $_GET ['id'];
		if ($this->_model === null) {
			$this->_model = Post::getById ( $id );
		}
		if ($this->_model === null) {
			throw new CHttpException ( 404, "页面不存在" );
		}
		return $this->_model;
	}
	
	/**
	 * Performs the AJAX validation.
	 *
	 * @param
	 *        	CModel the model to be validated
	 */
	protected function performAjaxValidation($model) {
		if (isset ( $_POST ['ajax'] ) && $_POST ['ajax'] === 'post-form') {
			echo CActiveForm::validate ( $model );
			Yii::app ()->end ();
		}
	}
	
	/**
	 * @param Post $post
	 * @return Comment
	 */
	protected function newComment($post) {
		$comment = new Comment ();
		if (isset ( $_POST ['Comment'] ) && 'comment-form' === $_POST['ajax']) {
			echo CActiveForm::validate($comment);
			Yii::app()->end();
		}elseif (isset ( $_POST ['Comment'] )) {
			$comment->attributes = $_POST ['Comment'];
			if ($post->addComment ( $comment )) {
				if ($comment->status == Comment::STATUS_PENDING) {
					Yii::app ()->user->setFlash ( 'commentSubmitted', 'Thank you for your comment.' );
				}
				$this->refresh ();
			}
		}
		return $comment;
	}
}
